Thought I'd post this for those looking. Here is a walk through WITH all FILES need for Root & TWRP, along with XPOSED for the Android 6.0.1 Update.
If you break your device I am NOT RESPONSIBLE.
MAKE SURE DEVELOPER OPTIONS IS ON & OEM UNLOCK is CHECKED before proceeding.
Download the following files...
Odin 3.10.7
TWRP 3.x
SuperSU Beta 2.68
XPOSED FRAME WORK
XPOSED APK
Extract the Odin file
Reboot phone into Download Mode (Turn phone off, hold POWER+HOME BUTTON+VOL DOWN)
Connect phone to computer (Make sure Samsung USB Drivers are installed)
Select TWRP file and load into AP SLOT
Select the OPTIONS TAB & Make sure Restart & Repartion are UNCHECKED
Click start and wait for it to finish
Now Hold Vol Down+Power button and reboot phone
As it reboots hold VOL UP+HOME BUTTOM+POWER BUTTON
Let go as soon as you see RED text that means your entering TWRP
When you enter TWRP flash SuperSU zip
You can also flash XPOSED If you choose to (I use Gravity Box for tweaks for the time being, you will also need the XPOSED APK!)
Then make sure to do a Wipe / Format > Advanced Wipe > WIPE CACHE / Dalvik / Art
Reboot & wait 3-5 minutes and your good to go. NO KERNEL NEEDED and NO KNOX WARNINGS.

I agree it's a lot smoother. Battery seems a lot better and snappiness all around. Will be curious how many updates they push out for bugs and such...
I tried to wipe everything and flash a custom 5.1.1 rom over the 6.0.1 firmware but that just kept giving me a boot loop lol. No big deal though nothing can't be unbricked.

7+ is a bit of a stretch.No its not when there's users citing the exact same findings... However I average about 5 to 6 as I don't use wifi and my signal jumps around due to traveling and such. That's the point lol. You can't say 7+ hours when sure maybe Bobby Jo got it once. or twice. Or is the only one to get it. Reasonable SOT with Chroma is around 5-6 with average conditions considered. True. Regardless the features are there that rub is looking for.

Hey Guys I have a asus 10.1 inch tablet for sale if anyone is interested. Comes with the keyboard as well. Looking too get 200.00 retails for 300.00 Hit me up if interested only 1-2 months old barley used.